steel strand
for prestressed concrete

anluminum stranded and
steel cored aluminium stranded

zinc-plated
steel strand


steel wire for type dead
carbon spring steel wire
carbon spring steel wire
for non-mechanical spring
zinc-plating low-carbon steel wire
for armoured cable



Steel strand twisted by round steel wire used for prestressed concrete structure.rock or earth anchoraoe etc.

PC STRANDS BEFORE PACKING PC STRANDS WITH PACKING

 



1กม2 construction steel strand



1กม3 construction steel strand

1กม7 construction steel strand

Aunnotation:Dg- (Diameter of steel strand )mm;
dกฃ- (diameter of central steel wire ) mm;
d- (diameter of outer steel strand)mm;
a-(1กม3 construction measurement size of steel strand)mm

 



1กม2 construction sizes and
allowable of steel strand
construcetion of steel strand
nominal diameter(mm)
diameter allowable tolerance (mm) nominal sectional area(mm2)
theo retical weight of every 1000m steel strand(kg)
steel strand steel wire
1กม2 10.00 5.00 +0.30
-0.15
39.5 310
12.00 6.00 56.9 447




1กม3 construction sizes and allowable
tolerance table of steel strand
comstruction of steel strand nominal diameter measurement size of steel strand(MM) measurement size allowable tolerance of steel strand(mm) nominal sectional area of steel strand(mm2) theoretical weight of every 1000m steel strand(kg)
steel strand steel wire
1กม3 10.80 5.00 9.33 +0.30
-0.15
59.3 465
12.90 6.00 11.20 85.4 671




1กม7 construction sizes and allowable
tolerance table of steel strand

comstruction of steel strand nominal diameter(mm) diameter allowable tolerance(mm) nominal sectional area of steel strand(mm2) theoretical weight of every 1000m steel strand (kg) enlarged range of diameter of central steel wire not smaller than(%)
standard type 9.50

+0.30
-0.15

 

54.8 432 2.0
11.10 74.2 580
12.70 +0.40
-0.20
98.7 774
15.20 139 1101
mould drawn type

12.70

112 890
15.20 165 1295



table of sizes and tensile
properties of steel strand

construction of steel strand nominal diamenter of steel strand(mm) strength grade(mpa) maximum load of an entire strand yield load(kn) elongation rate(%) relaxaion rate at 1000h.not bigger than(%)
crade I reaxation grade II relaxation
preloading
not smaller than biggest load at 70% biggest load at 80% biggest load at 70% biggest load at 80%
1กม2 10.00 1720 67.9 57.7 3.5 8.0 12 2.5 4.5
12.00 97.9 83.2
1กม3 10.80 102 86.7
12.90 147 125
1กม7 standard
type
9.50 1860 102 86.6
11.10 1860 138 117
12.70 1860 184 156
15.20 1720 239 203
1860 259 220
moulddrawtype 12.70 1860 209 178
15.20 1860 300 255
 

 
 
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